Found it at IAH forums, in case you guys hadn't noticed it yet.
Someone pretty much figured out how the set item drops work..
Level 20
Toto F1 - Glove
Toto F2 - Shoes
Toto F3 - Shoulder
Toto F4 - Legs
White Tooth F1 - Helm
White Tooth F2 - Chest
Level 27
White Tooth F3 - Glove
White Tooth F4 - Shoes
Alvida F1 - Shoulder
Alvida F2 - Legs
Alvida F3 - Helm
Alvida F4 - Chest
Level 34
Artis F1 - Glove
Artis F2 - Shoes
Artis F3 - Shoulder
Artis F4 - Legs
Night Lord F1 - Glove
Night Lord F2 - Shoes
Night Lord F3 - Chest
Night Lord F4 - Helm
Level 40
Bahamole F1 - Glove
Bahamole F2 - Shoes
Bahamole F3 - Shoulder
Bahamole F4 - Legs
Sambaba F1 - Chest
Sambaba F2 - Helm
Level 47 - This wasn't labeled (F1/2/3/4), but I assume it's in order.
Sambaba F3 - Glove
Sambaba F4 - Shoes
Magma Coral Fields(?) F1 - Glove
Magma Coral Fields(?) F2 - Shoes
Magma Coral Fields(?) F3 - Shoulder
Magma Coral Fields(?) F4 - Pants
Massive Forest (lol)(?) F1 - Pants
Massive Forest (lol)(?) F2 - Chest
Massive Forest (lol)(?) F3 - Helm + Random
Massive Forest (lol)(?) F4 - Helm + Random
Level 54
Massive Forrest (lol)(?) F4 - Glove (Mentioned again?)
Gods' Sanctuary(?) F1 - Glove
Gods' Sanctuary(?) F3 - Shoulder
Forgotten Forest(?) F1 - Shoes
Forgotten Forest(?) F2 - Shoulder
Sleepy Slums(?) F1 - Shoulder
Sleepy Slums(?) F2 - Pants
Frigrid Canyon(?) F1 - Chest
